Other notable approaches that try to evolve the traditional paradigms and bridge top-k and skylines are ORD/ORU [1]} and UTK (Uncertain Top-k Query) [2]}. ORD implements the OSS (output-size specified) property, relaxed input and it is dominance-oriented, while the ORU approach also focuses on the first two characteristics of ORD as well, but it follows a utility paradigm instead of a dominance-oriented paradigm.
